Hi Ally - If you mean deburring the thread itself, this is usually called chasing. You can get chasing taps from an industrial supplier. I'm not sure how you get the two tools to "start" in the same spot if you are rigid tapping, some thought or research needed. I usually chase by hand but if you have a lot to do then a machine is the go. Peter
https://en.wikipedia.org/wiki/Tap_and_die